3. Chemical Reactions

Empirical Formula

Multiple Choice
What is the empirical formula for a compound containing 34.4% ethylenediamine, 2.101% Ni, 3.44% sulfate, and 60.06% water by mass?
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Open Question
What are the subscripts in the empirical formula of this compound?
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Guided course
5:39
Calculating the Empirical Formula Example 1
Jules Bruno
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Guided course
02:26
Empirical vs Molecular Formula
Jules Bruno
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Multiple Choice
In an experiment, 10.0 g of sulfur and 10.0 g of oxygen react completely to form an oxide of sulfur. What is its empirical formula?
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Open Question
A 4.08 g sample of a compound of nitrogen and oxygen contains 3.01 g of oxygen. What is the empirical formula?
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Open Question
A sample of an iron-containing compound is 22.0% iron, 50.2% oxygen, and 27.8% chlorine by mass.
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Multiple Choice
An unknown compound contains only carbon, hydrogen, and chlorine. Using combustion analysis, you burned 22.56 mg of the sample and collected 7.11 mg of H2O and 52.93 mg of CO2. What is the empirical formula of this compound?
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Open Question
What is the empirical formula for a compound that is 43.6% phosphorus and 56.4% oxygen?
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Open Question
To indicate the number of atoms of each element present in a molecular compound, scientists use -
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Open Question
Which of the following could only be a molecular formula?
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Multiple Choice
Covalent compounds
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Open Question
What is the empirical formula for the gas formed?
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08:31
Empirical Formula and Molecular Formula Introduction
Tyler DeWitt
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Open Question
The lowest whole number ratio of the elements in a compound is called
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